With over 1200 members, the Greenbank RSL Sub-Branch Inc. is one of the largest in the South Eastern District and Queensland.

The role of any Sub-Branch is to service the needs of its members, members of the ex-Service community and currently serving members of the Australian Defence Force and their families.

The Sub-Branch is also responsible for the organisation of Commemorative Services such as Anzac Day, Korean Veteran's Day, Vietnam Veteran's Day, Merchant Mariner's Day and Remembrance Day which are held in the Memorial Gardens of the Greenbank RSL Services Club.

The Sub-Branch meets in the Greenbank RSL Services Club on the third Monday of each month from 7pm. All Sub-Branch members are welcome to attend.